Imma thinking the thermal paste/TIM has just gone bad probably? I no longer have my 510 but I did repaste it when I still had mine.

Also, the heatsink mounting on the motherboard seems a bit... fragile. Worse case scenario the mounting has detached/loosened itself off the MBB and the heatsink isn't in proper contact to the TIM in the first place.

Or the tiny heat fan inside is just filled with dust ler. Which is pretty minor but still needs to be settled. If you're not comfortable with DIY just send it in to Lenovo and ask them to check.

Yes, I am using since 2018. Bought it from AliExpress for USD12.

Last year around October sent to Service Center to check because the battery is bloated and pushed the bottom part of the screen away from the casing.

The tech help me to remove the battery and glue back the screen for free. The tech also advise me to get the battery outside because Lenovo price is expensive. Estimated around RM350 to 400 and also need to wait as they don't have stock.

At the same time checked the fan and discovered the fan is dirty. After cleaning then no more noisy sound.

So finally I bought the replacement battery from AliExpress for USB48.75 in November 2019 and it is still working.

Btw, I changed the motherboard this year due to it intermittent unable to detect the SSD. Luckily it is still under warranty.

I also did the SSD upgrade to Samsung 970 EVO Plus 512GB in Jan this year.

I am using tempered glass. So far so good as I hardly use the pen.

Btw, I notice the keyboard will press against the screen when closed and leaving keyboard mark on it.

How about you?